DrawEllipse with no markers on Line

Question

Roxana Sierra 2023-3-16

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1930090-drawellipse-with-no-markers-on-line

评论： Roxana Sierra 2023-3-17

Hello

I would like to have an ellipse on my scatter plot (not an image) that I am creating with the scatter function. I would like to enclose certain data points with an ellipse.

I tried two ways:

inserting an ellipse from the interactive Figure window. However, I cannot make it transparent (no FaceAlpha)
using drawellipse from the Image Processing Tool Box. This works very well, except that the 4 markers show on the ellipse line. I changed the MakerSize to 0.1 and this helps but they are still visible and can be confused with actual data points from my scatter plot. I was wondering if there is a way to show the ellipse with no markers on the line.

Thanks!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2023-3-16

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1930090-drawellipse-with-no-markers-on-line#answer_1194620

See attached demos where I put ellipses on graphs with no handles. One of them should do what you want.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Roxana Sierra 2023-3-17

Thanks for that. However, it is not what I was looking for. I am using the drawellipse function (https://www.mathworks.com/help/images/ref/drawellipse.html). And it works well except that the markers of the ellipse show as seen in the left panel in figure attached.

I just found how to do it: this should be added to the Tips section of the Ellipse Documentation:

Position the pointer near a vertex. The pointer changes to the rotate pointer. press Shift and Click. Markers will dissapear and image can be copied with ellipse (and no markers).

请先登录，再进行评论。